Hi, I agree they should have shared nonce, but still I think FS should use same IP for initial and challenged invite unless TTL for domain is not expired. Is there a way to force it to such behaviour? I've tried with fs_path but seems this does not work for challenged invite neither Somebody posted bug FS-8820 on same case but with different carrier. Regards Date: Tue, 19 Jun 2018 14:26:53 -0400

if they are doing nonces on a shared realm, they should be sharing those nonces across their cluster. If they are not, every time it hits a diff member of the cluster you will get a stale nonce and have to go through that juggle again. This is just a side effect of how sip auth works.

On Jun 19, 2018, at 12:50 PM, Marcin Kowalczyk <kowalma@gmail.com> wrote:

Hi,

I'm having problem setting-up trunk with provider who does have muliple sip-proxies with not shared nonce db.

sip.freeconet.pl resolves to 3 diffrent IP and FS does not cache/remeber IP that send back request.

So we have a case FS->P1: Invite P1 -> FS -> 407 + nonce FS does again DNS lookup and FS->P2 Invite with nonce from P1 P2->FS 407 FS fails call.

Is there a way to force FS to send all messages within dialog to one IP only ?

Regards